@xspswap/smart-order-router
Version:
XSwap Protocol V3 Smart Order Router
133 lines • 10.7 kB
JavaScript
;
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.V3SubgraphProvider = exports.printV2SubgraphPool = exports.printV3SubgraphPool = void 0;
const async_retry_1 = __importDefault(require("async-retry"));
const await_timeout_1 = __importDefault(require("await-timeout"));
const graphql_request_1 = require("graphql-request");
const lodash_1 = __importDefault(require("lodash"));
const util_1 = require("../../util");
const printV3SubgraphPool = (s) => `${s.token0.id}/${s.token1.id}/${s.feeTier}`;
exports.printV3SubgraphPool = printV3SubgraphPool;
const printV2SubgraphPool = (s) => `${s.token0.id}/${s.token1.id}`;
exports.printV2SubgraphPool = printV2SubgraphPool;
const PAGE_SIZE = 1000; // 1k is max possible query size from subgraph.
class V3SubgraphProvider {
constructor(chainId, subgraphUrl, retries = 2, timeout = 30000, rollback = true) {
this.chainId = chainId;
this.subgraphUrl = subgraphUrl;
this.retries = retries;
this.timeout = timeout;
this.rollback = rollback;
if (!subgraphUrl) {
throw new Error(`No subgraph url for chain id: ${this.chainId}`);
}
this.client = new graphql_request_1.GraphQLClient(this.subgraphUrl);
}
async getPools(_tokenIn, _tokenOut, providerConfig) {
let blockNumber = (providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? await providerConfig.blockNumber
: undefined;
const query = (0, graphql_request_1.gql) `
query getPools($pageSize: Int!, $id: String) {
pools(
first: $pageSize
${blockNumber ? `block: { number: ${blockNumber} }` : ``}
where: { id_gt: $id }
) {
id
token0 {
symbol
id
}
token1 {
symbol
id
}
feeTier
liquidity
totalValueLockedUSD
totalValueLockedETH
}
}
`;
let pools = [];
util_1.log.info(`Getting V3 pools from the subgraph with page size ${PAGE_SIZE}${(providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? ` as of block ${providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber}`
: ''}.`);
await (0, async_retry_1.default)(async () => {
const timeout = new await_timeout_1.default();
const getPools = async () => {
let lastId = '';
let pools = [];
let poolsPage = [];
do {
const poolsResult = await this.client.request(query, {
pageSize: PAGE_SIZE,
id: lastId,
});
poolsPage = poolsResult.pools;
pools = pools.concat(poolsPage);
lastId = pools[pools.length - 1].id;
} while (poolsPage.length > 0);
return pools;
};
/* eslint-disable no-useless-catch */
try {
const getPoolsPromise = getPools();
const timerPromise = timeout.set(this.timeout).then(() => {
throw new Error(`Timed out getting pools from subgraph: ${this.timeout}`);
});
pools = await Promise.race([getPoolsPromise, timerPromise]);
return;
}
catch (err) {
throw err;
}
finally {
timeout.clear();
}
/* eslint-enable no-useless-catch */
}, {
retries: this.retries,
onRetry: (err, retry) => {
if (this.rollback &&
blockNumber &&
lodash_1.default.includes(err.message, 'indexed up to')) {
blockNumber = blockNumber - 10;
util_1.log.info(`Detected subgraph indexing error. Rolled back block number to: ${blockNumber}`);
}
pools = [];
util_1.log.info({ err }, `Failed to get pools from subgraph. Retry attempt: ${retry}`);
},
});
const poolsSanitized = pools
.filter((pool) => parseInt(pool.liquidity) > 0 ||
parseFloat(pool.totalValueLockedETH) > 0.01)
.map((pool) => {
const { totalValueLockedETH, totalValueLockedUSD } = pool, rest = __rest(pool, ["totalValueLockedETH", "totalValueLockedUSD"]);
return Object.assign(Object.assign({}, rest), { id: pool.id.toLowerCase(), token0: {
id: pool.token0.id.toLowerCase(),
}, token1: {
id: pool.token1.id.toLowerCase(),
}, tvlETH: parseFloat(totalValueLockedETH), tvlUSD: parseFloat(totalValueLockedUSD) });
});
util_1.log.info(`Got ${pools.length} V3 pools from the subgraph. ${poolsSanitized.length} after filtering`);
return poolsSanitized;
}
}
exports.V3SubgraphProvider = V3SubgraphProvider;
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